diff --git a/include/types/oid.h b/include/types/oid.h
index d69b53f..a1a601e 100644
--- a/include/types/oid.h
+++ b/include/types/oid.h
@@ -1,5 +1,5 @@
-#ifndef _QUARK_OID_H
-#define _QUARK_OID_H
+#ifndef QUARK_OID_H
+#define QUARK_OID_H
 
 typedef unsigned int oid_t;